input: merge InputSourceNew() and InputSourceInit()
input: merge InputSourceNew() and InputSourceInit()

Also merge InputSourceClean() and free().

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc